app.js

//import express
const express = require('express');
const app = express();

// import morgan package
const morgan = require('morgan');

//use it
app.use(morgan('dev'));
// Routes which should handle request

// import body-parser
const bodyParser = require('body-parser');
// let's use it
app.use(bodyParser.urlencoded({
    extended: false
}));
app.use(bodyParser.json());

app.use((req, res, next) => {
    res.header("Access-Control-Allow-Origin", "*");
    // res.header("Access-Control-Allow-Methods: POST");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    next();
});

// defining routes
const ingredientRoute = require('./routes/ingredients')
app.use('/ingredients', ingredientRoute);

app.use((req, res, next) => {
    const error = new Error("Not found");
    error.status = 404;
    next(error);
});

app.use((error, req, res, next) => {
    res.status(error.status || 500);
    res.json({
        error: {
            message: error.message
        }
    })
});

//export app
module.exports = app;